Ophthalmic mounting



Aprifi M, 1936. J; A. SWEENEY OPHTHALMIC MOUNTING Filed Dec. 16, 1952 I IN VEN TOR. E fiwmwy a M a y A TTORNEYS.

Patented Apr. 14, 1936 v UNITED STATES OPHTHALMIC MOUN TING James A. Sweeney, Providence, R. I.,: assignor to Universal. Optical Corporation, a corporation of Rhode Island Application December 16, 1932, Serial No.'647, 613

4 Claims.

This invention relates to an ophthalmic mounting,- more particularly the mounting of a clamp or so-called strap upon a lens-and has for one of its objects the provision of a construction which will apply sufficient pressure upon the retaining screw or bolt for securing the strap to the lens and prevent the bolt or screw from becoming accidentally loosened.

Another object of the invention is to provide a mounting which may be secured to a lens without an accurate location of the hole thru the lens thru which the retaining screw passes.

Another object of the invention is the provision of a unit assembly by which the strap may be mounted upon the lens by a single screw and be self-conforming andfiexibly maintained in the desired alignment with the lens. 7

A further object of the invention is the provision of a unit assembly by which shocks or jars may be absorbed and the spring may be forced beyond the edges of the body of the strap and V maintain greater pressure upon the securing bolt or allow great flexible pivotal movement of the strap and lens.

A still furtherobject of the invention is the provision of a unit assembly by which the spring may be maintained in its desired position against rotation. V

With these and other objects in viewQthe invention consists of certain novel 'features'of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a front elevation of a spectacle showing the improved straps as mounted thereon.

Fig. 2 is an enlarged view of a fragmental portion of the lens, strap and bridge with portions in section to better illustrate the relative arrangement of the parts.

Fig. 3 is a view similar to Fig. 2 with the parts in full;

Fig. 4 is a perspective view of one form of strap detached from the lens;

Fig. 5 is a perspective view of a slightly modified form of strap detached from the lens;

Fig. 6 is a perspective view of the strap with one of the ears of the strap broken away and also exposing one type of pin;

Fig. '7 is a perspective view similar to Fig. 6 and showing a differently shaped pin as formed thereon;

Fig. 8 is a sectional view of a still further modified form of strap and showing an opening in, rather than a pin on, the body thereof;

Figs. 9, 10 and 11 are perspective views of straps with variously shaped cooperating means for receiving dififerently'sha-ped pins or projections;

Fig. 12 is a perspective view of a strap showing I a projection formed thereon to fit within a recess such as illustrated in Fig. 8.

Referring to'the drawing, numeral l5 designates the lenses to which there are attached straps designated generally l6 at the outer edges or the lenses and straps designated generally ll at the inner edges of the lenses. Temples l8 are connected to the straps it while the bridge [9 is connected to the straps I7.

The type of strap here illustrated is used on a rimless mounting and consists generally of a body portion 20 with a pairof ears 2i securedtc the body portion and extending therefrom. Each of these ears is pierced; the opening 22 in one ear being threaded while the opening 23 in the other edge2'5; as illustrated in Figsll to 4*inclusive,or

it may be convex as at 21, to provide a greater area to which the arm of thebridge l9 may be se-. cured for the support of the strap.

A leaf spring 28 is concavo-convex in shape and positioned with its convex surface against the lens side or inside the flat surface of the body portion of the strap while its end portions 29 engage the edge of the lens and maintain a pressure on the securing bolt 24 toprevent the bolt from becoming loosened and detached from its securing position. This spring also permits of flexibility between the lens and the strap by the swinging of the strap about the bolt 24 and in cases where the lens strap is of a length less than the length of the spring as shown at 30, in Fig. 3, the end portions 29 of the spring may be flexed to a distance beyond the plane of the inner flat surface 25 of the body and thus permit greater flexibility or swing of the lens about the bolt 24 as a pivot by reason of this shorter length. By this arrangement the spring or lens is maintained in its desired position relative to the bridge and the other lens altho allowing of flexibility of movement to absorb shocks and prevent breakage.

The spring is maintained in the desired position to exert even pressure on either side of the pivot 24 by reason of a projection on one part anda recess in the other.

My preferred form of centering means is to draw up a projection on the body part, which projection I have illustrated as elongated and of rectangular shape as at 3| in Fig. 4, while an opening 32 in the spring, shown in Fig. is shaped to fit the same. In other instances, the projection'33 is drawn up in a square shape by suitably striking the body portion in a die and I have illustrated in Fig. 9 a square opening 34 in the spring to fit the same. In another instance in Fig. 6, the projection 35 is of oblong or generally elliptical shape while an oblong or elliptical opening 36 is indicated in Fig. 11 to fit the same. In Fig. 8, I have illustrated an opening 31 in the body part, while in Fig. 12 a correspondinglyshaped projection 38 is cut and raised from the stock of the spring to fit within this opening and thus these interfitting parts may vary in detail but all serve to maintain the spring in its desired vertical position and also by reason of the shape of these interengaging parts the spring is prevented from rocking to any material extent relative to the strap that it may always maintain engagement with the lens.

It will also be observed that the spring is .positioned between the ears 2| and by this arrangement the spring is also prevented from undue rocking. In some instances, I may rivet over the head of the pins formed as at 40, in Fig. 2, altho I do not wish to be confined to riveting the pin for securing it to the body portion of the strap as the same may be soldered or welded and struck in suitable tools afterwards to restore the stiffness to the spring.

The arms of the bride l9 may be connected to the outer surface of the strap in any suitable manner such as by soldering, riveting or the like.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

' I claim:

1. In an ophthalmic mounting, a lens strap comprising an elongated body portion provided with an elongated fiat surface to extend along the edge of the lens, a pair of ears secured to said body midway between its ends and extending over the opposite faces of the lens and pivotally secured thereto, and a spring located between and symmetrical with respect to said ears and interposed between the flat surface of said body and the edge of the lens to rock along said fiat surface as the lens and strap are moved about said pivot.

2. In an ophthalmic mounting, a lens strap comprising an elongated body portion provided with an elongated fiat surface to extend along the edge of the lens, a pair of ears secured to said body midway between its ends and extending over the opposite faces of the lens and pivotally secured thereto, and a leaf spring of concave shape located between said ears and interposed between the flat surface of said body and the edge of the lens with its convex side adjacent said fiat surface and its end portions against the lens to rock along said flat surface as the lens and strap are moved about said pivot.

3. In an ophthalmic mounting, a lens strap comprising an elongated body portion with an elongated flat surface to extend along the edge of the lens, a pair of ears secured to said body midway between its ends and extending over the opposite faces of the lens and pivotally secured thereto, a spring located between and symmetrical with respect to said ears and interposed between the fiat surface of said body and the edge of the lens to rock along said fiat surface as the lens and strap are moved about said pivot, and interengaging means on said spring and body comprising a recess in one and a projection on the other to fit therein.

4. In an ophthalmic mounting, a lens strap comprising an elongatedbody portion provided with an elongated fiat surface to extend along the edge of the lens, a pair of ears secured to said body midway between its ends and extend ing over the opposite faces of the lens and pivotally secured thereto, a spring located between and symmetrical with respect to said ears and interposed between said fiat surface and the edge of the lens to rock along said flat surface as the lens and strap are moved about said pivot, and interengaging means on said spring and body comprising a recess in one and a projection on the other to fit therein, said pin being drawn up from and integral with the stock of the part on which it is located.

JAMES A. SWEENEY. 

